The thermal stability of ethyl silicone oil is relatively good, as shown below:

Temperature range: Ethyl silicone oil has a wide operating temperature range and can usually maintain stable operation in the temperature range of -60℃ to 150℃, which shows that it has good thermal tolerance.
Physical property stability: Ethyl silicone oil can maintain its physical and chemical properties unchanged in a wide range of temperature and pressure, which is an important manifestation of its high stability.
Experimental evidence of thermal stability: Studies have shown that the thermal stability of phenyl vinyl silicone oil prepared by adding specific ingredients (such as octaphenylcyclotetrasiloxane) and copolymerizing with methyl vinyl silicone oil increases with the increase in the amount of octaphenylcyclotetrasiloxane. This shows that ethyl silicone oil or its related derivatives can show better thermal stability under specific conditions.
Proof of application field: Ethyl silicone oil is widely used as an electrical insulating fluid in electrical equipment such as transformers, capacitors and insulators. These equipment often need to work in harsh environments such as high temperature and high pressure, and ethyl silicone oil can maintain its insulation properties and thermal stability, which further proves its good thermal stability.

In summary, ethyl silicone oil has good thermal stability, can maintain its physical and chemical properties in a wide temperature range, and is widely used in fields that require high-stability materials. However, it should be noted that the thermal stability of ethyl silicone oil may be affected by factors such as its purity, preparation process, and use environment, so it needs to be evaluated and selected according to specific circumstances in actual applications.